Difference between revisions of "Peripheral Nervous System - Histology"
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| − | + | ==Introduction== | |
| + | Nerves of the peripheral nervous system (PNS) are composed of numerous bundles of nerve fibers that are surrounded by connective tissue. This connective tissue also contains a specific layer that is specialised to neurons; the '''peri-neurium'''. | ||
===Histology of Myelinated Nerves=== | ===Histology of Myelinated Nerves=== | ||
Revision as of 17:05, 23 October 2011
Introduction
Nerves of the peripheral nervous system (PNS) are composed of numerous bundles of nerve fibers that are surrounded by connective tissue. This connective tissue also contains a specific layer that is specialised to neurons; the peri-neurium.
Histology of Myelinated Nerves
Histology of Myelinated Nerve with lipid stain
The myelin stained here gives the nerve it's shape and support.
The perineurium and endoneurium provide a constant environment for the nerve fibres.
Histology of Myelinated Nerve (longitudinal section)
Histology of Ganglion
Histology of Autonomic Ganglion
Histology of Dorsal Root Ganglion
Comparison of the histology of the ganglion
| Autonomic Ganglion | Dorsal Root Ganglion |
|---|---|
| Multipolar cells | Pseudo-unipolar cells |
| Satellite cell layer incomplete.
(amphicytes) |
Satellite cells form complete covering.
(amphicytes) |
| Satellite cell layer incomplete.
(amphicytes) |
Satellite cells form complete covering.
(amphicytes) |
| Cells and fibre tracts interspersed. | Cells and fibre tracts in separate regions. |
| Nucleus usually off centre. | Nucleus centrally placed. |
 |
This article is still under construction. |